Pick.



T. F. RIRD.

PICK.

APPLICATION FILED 061216. 1918.

- Patented Mar. 11,1919.

THOMAS F. BIRD, OF WILKES-BARBIE, PENNSYLVANIA.

PICK.

Specification of Letters Patent.

Patented Mar. 11, 1919.

Application filed October 16, 1918. Serial No, 258,447.

To all whom it may concern:

Be it known that I, THOMAS F. BIRD, a citizen of the United States, anda resident of Wilkes-Barre, in the county of Luzerne and State ofPennsylvania, have invented certain new and useful Improvements inPicks, of which the following is a specification.

This invention relates to mine picks, and an object of the invention isto provide a pick construction, which will facilitate the attaching ofthe blade or head to the handle of the pick, and provide a secureconnection between the handle and blade, eliminating any liability ofdisconnection of these members, during the use of the pick and also toprovide, a connection structure which includes a pair of oppositelybeveled wedge members, one of which is provided with a concaved recessadapted to receive the convex lower surface of the other wedge, to allowthe proper positioning of the wedge to securely wedge or connect thepick head or blade to the handle, and prevent any movement of the headwith respect to the handle, in case the inner edge of the blade is notparallel with the outer edge thereof.

Another object of the invention is to provide, in a pick structure asspecified, means whereby pick heads of various widths through theirmajor thicknesses may be attached to the handle without necessitatingalteration of either the head, handle or the wedged members. I I

Other objects of the invention will appear in the following detaileddescription taken in the connection with the accompanying drawing,forming a part of this specification, and in which drawingr Figure 1 isa perspective view of the improved pick.

Fig. 2 is a sectional view through the handle and ferrule carriedthereby illustrating the manner of connecting the pick blade to thehandle.

Fig. 3 is a longitudinal section through the handle, pick head andmechanism for connecting them, taken at right angle to the sectionillustrated in Fig. 2.

Fig. 4 is a view similar to Fig. 3 illustrating the adaptability of theconnecting wedge to pick heads having their inner and outer edgesunparallel, and

Fig. 5 is a detail perspective view of one of the wedge members used inthe pick structure.

Referring more particularly to the draw- 7 ing, 1 indicates the pickhandle which has a head or ferrule 2 mounted upon the outer end thereofwhich head or ferrule 2 is provided with a socket opening 3 whichreceives the end of the pick handle 1 and the transverse opening 4through which the blade 5 of the pick extends. These openmgs may havecommunication with each other if desired, as shown in the drawing. Theblade 5 of the pick has the usual workmg points 6 formed upon its endsand its back intermediate the points 6 is Provided with a recess 7equidistant of each end in which is seated the outer cross-piece 8 ofthe ferrule or head 2. When the cross-piece 8 is seated in the recess 7,the outer face of said'cross-piece lies flush with the outer surface ofthe blade 5.

A pair of wedge members 9 and 10 are employed for securely wedging theblade 5 in the transverse socket or opening 4 of the head 2. The wedge 9has its outer surface flat and its inner surface convex, it beingprovided with a plurality of spaced recesses 11 which are adapted toreceive the enlarged head 12 of the locking member 13. The lockingmember 13 is pivotally connected as shown at 14: to a depending ear 15formed upon the wedge block 10 for locking the wedge blocks 9 and 10 toprevent longitudinal movement of the wedge 9 out of the wedgingposition. The wedge block 10 is provided with a concave recess 16 in itsupper surface which is adapted to receive the convex side of the wedgeblock 9, as clearly shown in Figs. 3 and 4 of the drawing, thus when theinner side of the pick head 2 is angled, or cut slanting, as shown inFig. 4, or in case the outer and inner edges of the pick blade are notparallel, the wedge 9 may move to properly engage the blade 5 forsecurely wedging the same in position, preventing any movement whateverof the blade 5 with respect to the handle 1, and eliminating thenecessity of straightening the sides or edges of the blade 5 prior toits insertion through the opening 4 of the head secure the blade inplace and prevent movement thereof independently of the handle 1.

Changes in details may be made Without departing from the spirit of thisinvention, but:

I claim:

1. In a mine pick structure, the combina tion, of a handle, a headcarried by the handle and provided With atransverse bore, a bladeextending through said bore, a pair of Wedge members extending throughsaid bore in opposed relation to each other, one of said Wedge membersengaging the inner edge of said blade and provided with a plurality ofspaced recesses, the other of said Wedge members engaging the outer faceof said first named Wedge member, an ear formed upon said last mentionedWedge member, a locking pawl pivotally carried by said car and adaptedfor engagement With one of said recesses.

2. In a mine pick structure, the combination, of a handle, a headcarried by the handle and provided with a transverse bore, pick bladeextending through said bore, a pair of Wedge members extending throughsaid bore in opposeo relation to each other, one of said. Wedge membershaving a flat outer face and a convex inner face, said Wedge memberprovided with a plurality of spaced recesses in its convex face, saidfiat face adapted for facial abutment vvith the inner edge of said pickblade, the other of said Wedges being provided with a concave face forreceiving therein portion of the convex face of said first named wedge,and a locking paivl pivotally carried by said second named Wedge forengagement in one of said recesses.

3. in a mine pick structure, the combination, of a handle, a headcarried by the ban- Copies of this patent may be obtained for dle andprovided with a transverse bore, a pick blade extending through saidbore, a Wedge member having a flat outer surface adapted for facialabutment against a portion of the inner edge of said pick blade andhavng an inner convexly curved face, a second \vedge member carried bysaid head and positioned in opposed relation to said first mentionedwedge member, said second Wedge member provided with a substantiallysemi-circular concave recess in its outer face for receivin a portion ofthe convex face of said first Wedge member to permitthe fiat face of thefirst \vedge member to be positioned at an angle other than parallel tothe fiat face of the second wedge member.

4:. In a mine pick structure, the combination, of a handle, a headcarried by the handle and provided with a transverse bore, a pick bladeextending through said bore, a Wedge member having a fiat outer surfaceadapted for facial abutment against a portion of the inner edge of saidpick blade and having an inner convexly curved face, a second Wedgemember carried by said head and positioned in opposed relation to saidfirst mentioned Wedge member, said second Wedge member provided with asubstantially semicircular concave recess in its outer face forreceiving a portion of the convex face of said first viedge member topermit the flat face of th first Wedge member to e positioned at anangle and other than parallel to the fiat face of tee second Wedgemember, said pick blade provided with a recess in its outer edgeintermediate its end, a portion of said head adapted to engage in saidrecess for co-action with said Wedges to securely lock the pick blade tosaid handle.

THOBLIAS l. BIRD.

five cents each, by addressing the Commissioner of Patents,

Washington, D. G.

